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Sponsored Artificial Intelligence: A Modern Approach, Global Edition Artificial Intelligence: A Modern Approach, Global Edition

Author

Longjiang Li

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Open access 2026

RODTI: A Method for Extracting Ionospheric Scintillation-Related Index Based on DORIS Dual-Frequency Observations and Its Verification on a Global Scale

The advent of the peak year of the 25th solar cycle has led to a notable intensification of ionospheric disturbances, resulting in frequent occurrences of ionospheric scintillation. Ionospheric scintillation has emerged as a critical factor compromising the stability of global navigation satellite system (GNSS) positio...

Dong-Sheng Zhao, Huai-Ke Liu, Ke-Fei Zhang et al. · 0 citations
Open access Oct 2026

Robust Real-Time Orbit Determination After GNSS Outages via Uncertainty-Aware Predicted-Orbit Constraints

Accurate and continuous onboard real-time orbit determination (RTOD) is essential for Low Earth Orbit (LEO) satellites, but temporary interruptions of onboard Global Navigation Satellite Systems (GNSS) observations can degrade orbit continuity and delay filter re-convergence. Although predicted-orbit constraints can ac...

Ding-Yi Liu, Chun-Tao Chang, Long-Jiang Li et al. · 0 citations
Open access 2026

ARIMA-KOA-CNN-GRU-Attention Model for Improving GNSS Water Vapor Prediction

Precipitable water vapor (PWV), retrievable from Global Navigation Satellite Systems (GNSS) measurements, is a key indicator of tropospheric water vapor content and crucial for weather forecasting and climate research. However, the prediction of PWV usually relies on a single model or a simple hybrid model, with limite...

Xiangrong Yan, Wei-Fang Yang, Ke-Fei Zhang et al. · 0 citations

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